discourse/app/models/web_crawler_request.rb

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class WebCrawlerRequest < ActiveRecord::Base
include CachedCounting
# auto flush if older than this
self.autoflush_seconds = 1.hour
cattr_accessor :max_record_age, :max_records_per_day
# only keep the top records based on request count
self.max_records_per_day = 200
# delete records older than this
self.max_record_age = 30.days
def self.increment!(user_agent, opts = nil)
ua_list_key = user_agent_list_key
$redis.sadd(ua_list_key, user_agent)
$redis.expire(ua_list_key, 259200) # 3.days
perform_increment!(redis_key(user_agent), opts)
end
def self.write_cache!(date = nil)
if date.nil?
write_cache!(Time.now.utc)
write_cache!(Time.now.utc.yesterday)
return
end
self.last_flush = Time.now.utc
date = date.to_date
ua_list_key = user_agent_list_key(date)
while user_agent = $redis.spop(ua_list_key)
val = get_and_reset(redis_key(user_agent, date))
next if val == 0
self.where(id: req_id(date, user_agent)).update_all(["count = count + ?", val])
end
rescue Redis::CommandError => e
raise unless e.message =~ /READONLY/
nil
end
def self.clear_cache!(date = nil)
if date.nil?
clear_cache!(Time.now.utc)
clear_cache!(Time.now.utc.yesterday)
return
end
ua_list_key = user_agent_list_key(date)
while user_agent = $redis.spop(ua_list_key)
$redis.del redis_key(user_agent, date)
end
$redis.del(ua_list_key)
end
protected
def self.user_agent_list_key(time = Time.now.utc)
"crawl_ua_list:#{time.strftime('%Y%m%d')}"
end
def self.redis_key(user_agent, time = Time.now.utc)
"crawl_req:#{time.strftime('%Y%m%d')}:#{user_agent}"
end
def self.req_id(date, user_agent)
request_id(date: date, user_agent: user_agent)
end
end
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# == Schema Information
#
# Table name: web_crawler_requests
#
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# id :bigint(8) not null, primary key
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# date :date not null
# user_agent :string not null
# count :integer default(0), not null
#
# Indexes
#
# index_web_crawler_requests_on_date_and_user_agent (date,user_agent) UNIQUE
#